If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

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If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

A. Meet in a point

B. Be all parallel

C. At least two of them must meet

D. All the above are correct

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The slope on the road surface generally provided on the curves is known as

A. Angle of friction

B. Angle of repose

C. Angle of banking

D. None of these

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The velocity of a body on reaching the ground from a height h, is

A. 2.√(gh)

B. √(gh)

C. √(2gh)

D. 2g.√h

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If two bodies having masses m₁ and m₂ (m₁>m₂) have equal kinetic energies, the momentum of body having mass m₁ is _________ the momentum of body having mass m₂.

A. Equal to

B. Less than

C. Greater than

D. None of these

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The moment of inertia of a thin rod of mass m and length l, about an axis through its centre of gravity and perpendicular to its length is

A. ml²/4

B. ml²/ 6

C. ml²/8

D. ml²/12

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The moment of inertia of a square of side a about its diagonal is

A. a²/8

B. a³/12

C. a⁴/12

D. a⁴/16

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One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring.)

A. 2π. √(g/δ)

B. 1/2π. √(g/δ)

C. 2π. √(δ/g)

D. 1/2π. √(δ/g)

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The maximum mechanical advantage of a lifting machine is

A. 1 + m

B. 1 - m

C. 1 / m

D. m

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The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

A. Less than

B. Greater than

C. Equal to

D. None of these

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Which of the following is a vector quantity?

A. Energy

B. Mass

C. Momentum

D. Angle

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The maximum frictional force which comes into play when a body just begins to slide over another surface is called

A. Limiting friction

B. Sliding friction

C. Rolling friction

D. Kinematic friction

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A single force and a couple acting in the same plane upon a rigid body

A. Balance each other

B. Cannot balance each other

C. Produce moment of a couple

D. Are equivalent

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Which of the following is not the unit of power?

A. kW (kilowatt)

B. hp (horse power)

C. kcal/sec

D. kcal/kg sec

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The unit of moment of inertia of an area is

A. kg-m²

B. kg-m-s²

C. kg/m²

D. m⁴

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The static friction

A. Bears a constant ratio to the normal reaction between the two surfaces

B. Is independent of the area of contact, between the two surfaces

C. Always acts in a direction, opposite to that in which the body tends to move

D. All of the above

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A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is

A. m₁/m₂

B. m₁. g. sin α

C. m₁.m₂/m₁ + m₂

D. m₁. m₂.g (1 + sin α)/(m₁ + m₂)

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The centre of gravity of a uniform lamina lies at

A. The centre of heavy portion

B. The bottom surface

C. The midpoint of its axis

D. All of the above

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Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

A. Their algebraic sum is zero

B. Their lines of action are at equal distances

C. The algebraic sum of their moments about any point in their plane is zero

D. The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

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The term 'Centroid' is

A. The same as centre of gravity

B. The point of suspension

C. The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

D. None of the above

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Moment of inertia of a circular section about its diameter (d) is

A. πd³/16

B. πd³/32

C. πd⁴/32

D. πd⁴/64

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Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

A. tan(α + φ)/tanα

B. tanα/tan (α + φ)

C. tan(α - φ)/tanα

D. None of these

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The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

A. Same

B. Double

C. Half

D. Four times

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The resolved part of the resultant of two forces inclined at an angle θ in a given direction is equal to

A. The algebraic sum of the resolved parts of the forces in the given direction

B. The sum of the resolved parts of the forces in the given direction

C. The difference of the forces multiplied by the cosine of θ

D. The sum of the forces multiplied by the sine of θ

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Which of the following is not the unit of pressure?

A. kg/cm

B. Bar

C. Atmosphere

D. Newton

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The units of moment of inertia of mass are

A. kg-m²

B. m²/kg.

C. kg/m²

D. kg/m

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The law of motion involved in the recoil of gun is

A. Newton's first law of motion

B. Newton's second law of motion

C. Newton's third law of motion

D. None of these

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The minimum force required to slide a body of weight W on a rough horizontal plane is

A. W sinθ

B. W cosθ

C. W tanθ

D. None of these

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If a rigid body is in equilibrium under the action of three forces, then

A. These forces are equal

B. The lines of action of these forces meet in a point

C. The lines of action of these forces are parallel

D. Both (B) and (C) above

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The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

A. mr²/3

B. 2mr²/3

C. 2mr²/5

D. 3mr²/5

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If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be

A. Same

B. Half

C. Double

D. None of these

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The ratio of limiting friction and normal reaction is known as

A. Coefficient of friction

B. Angle of friction

C. Angle of repose

D. Sliding friction

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Accepted Answer

D. All the above are correct

If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

Correct Answer :

Show all Engineering Mechanics MCQ

Related Questions

The slope on the road surface generally provided on the curves is known as

The velocity of a body on reaching the ground from a height h, is

If two bodies having masses m₁ and m₂ (m₁>m₂) have equal kinetic energies, the momentum of body having mass m₁ is _________ the momentum of body having mass m₂.

The moment of inertia of a thin rod of mass m and length l, about an axis through its centre of gravity and perpendicular to its length is

The moment of inertia of a square of side a about its diagonal is

One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring.)

The maximum mechanical advantage of a lifting machine is

The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

Which of the following is a vector quantity?

The maximum frictional force which comes into play when a body just begins to slide over another surface is called

A single force and a couple acting in the same plane upon a rigid body

Which of the following is not the unit of power?

The unit of moment of inertia of an area is

The static friction

A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is

The centre of gravity of a uniform lamina lies at

Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

The term 'Centroid' is

Moment of inertia of a circular section about its diameter (d) is

Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

The resolved part of the resultant of two forces inclined at an angle θ in a given direction is equal to

Which of the following is not the unit of pressure?

The units of moment of inertia of mass are

The law of motion involved in the recoil of gun is

The minimum force required to slide a body of weight W on a rough horizontal plane is

If a rigid body is in equilibrium under the action of three forces, then

The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be

The ratio of limiting friction and normal reaction is known as

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If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

Correct Answer :

Show all Engineering Mechanics MCQ

Related Questions

The slope on the road surface generally provided on the curves is known as

The velocity of a body on reaching the ground from a height h, is

If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.

The moment of inertia of a thin rod of mass m and length l, about an axis through its centre of gravity and perpendicular to its length is

The moment of inertia of a square of side a about its diagonal is

One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring.)

The maximum mechanical advantage of a lifting machine is

The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

Which of the following is a vector quantity?

The maximum frictional force which comes into play when a body just begins to slide over another surface is called

A single force and a couple acting in the same plane upon a rigid body

Which of the following is not the unit of power?

The unit of moment of inertia of an area is

The static friction

A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is

The centre of gravity of a uniform lamina lies at

Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

The term 'Centroid' is

Moment of inertia of a circular section about its diameter (d) is

Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

The resolved part of the resultant of two forces inclined at an angle θ in a given direction is equal to

Which of the following is not the unit of pressure?

The units of moment of inertia of mass are

The law of motion involved in the recoil of gun is

The minimum force required to slide a body of weight W on a rough horizontal plane is

If a rigid body is in equilibrium under the action of three forces, then

The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be

The ratio of limiting friction and normal reaction is known as

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If two bodies having masses m₁ and m₂ (m₁>m₂) have equal kinetic energies, the momentum of body having mass m₁ is _________ the momentum of body having mass m₂.